I'm attempting to wire in a 12 V fan to my car that draws 7 A at full speed. The fan is a fused link directly to the battery. I have a 12 V 20 mA signal wire, but that doesn't appear to be strong enough to trigger a standard automotive relay RL44.
Are there any options to support such a high switching current from such a low signal current?
@Winny and @Spephro Pefhany suggested a pilot/bootstrap. Is this the idea of how that would work?